论文部分内容阅读
基于当地实际降雨资料及饱和-非饱和渗流理论,设计3种不同的降雨方案,采用有限元软件对算例边坡降雨入渗对孔隙水压力的影响进行了分析。研究表明:降雨影响区域内的孔隙水压力由降雨前的负孔隙水压力逐渐向正孔隙水压力变化,变化速率受降雨强度控制,边坡表层入渗速率在边坡台阶处有突变;不同降雨强度对边坡在同一竖向截面孔隙水压力的影响规律是一致的,受降雨入渗影响后孔隙水呈现出随着高程的降低,孔隙水压力先降低后增大的趋势。
Based on the actual local rainfall data and the theory of saturated-unsaturated seepage, three different rainfall schemes were designed and the influence of rainfall infiltration on the pore-water pressure was analyzed by finite element software. The results show that the pore water pressure in the rainfall-affected area gradually changes from the negative pore water pressure before rainfall to the positive pore water pressure, the rate of change is controlled by the rainfall intensity, and the surface infiltration rate of the slope has a sudden change at the slope step. The influence of strength on the pore water pressure in the same vertical section is consistent. After the rainfall infiltration, the pore water shows a trend that the pore water pressure first decreases and then increases with the elevation decreasing.